What do you do when your code is running

I am wondering something silly, what do AI engineer do when they are training their model. Some models take hours to train and like if u run your model it means that it should be the best version you can do and the only way to find bugs is to run it, so there is not a lot of thing you can do. I am curious submitted by /u/Individual_Coyote_97 <a href="https:/